1. it works but not consistently

if it works the teeth are ok
if it works the motor is ok
if it works but sporadically this points to a 'failure to communicate" (lol)
between the incoming voltage and the motor

Cracked solder locations? Well, if that's the issue, I don't think I'm going to go there. I examined them, and as far as I can see, they look okay, but I don't think I want to mess with trying to reinforce them with more solder. I'm concerned I may screw them up, add too much solder or something that would affect their functionality. I imagine I would have to reinforce all of them as they all look about the same to me.
So as it is now, the odometer will turn over for a while, then stop, then start again and go for a while, and then stop. At one point it ran continuously for 311 miles, as I indicated above. So I don't know what my next step is here.
Any thoughts? Daikhster.


you said it yourself just above. you likely have cracks in the solder on of of the 3 point which constitute the motor voltage circuit. go to cleanflametrap.com for a nice write up with photos on where to resolder......or not